EMachines T2885 won't power on

[DaPurpleRT]

So, was finishing doing a few things on friend's enw Compaq, and she mentions she wishes she could get her old EMachines going to. I inquire about it. Apparently, the "fan ran all the time and one day it just shut off and refused to power on". PS I thought, and I sniffed it, boy it smelled burnt up.

So I hauled it home and cannabilized a PS off a Compaq I had sitting around. After putting it in, lgiht on the Mobo comes on. hey, that's good, but still no boot. One thing I noticed. I plugged the 20 pin connector in, but this MB also has a 4 pin, square power connector I hadn't seen before, and this PS has no hookup for it. What is this for? Is it necessary?

Also, any other thoughts on this issue welcome.

Thanks in advance,

Ryan

[CaptainOblivious]

ah the 4 pin is for the CPU power....gonna need a psu with the 20+4 pin connector

[DaPurpleRT]

So that's likely my non-power up issue now huh? Without that plugged in will the pc not even attempt to power on??

[Formerly the latter]

Nope, because if it has no CPU it cannot understand any base functions, rendering the whole PC useless. Get a new PSU

[DaPurpleRT]

Well, got brand new PS with 4 pin connector hooked up... Same thing, lighjt is on mobo, but won't power on. When I flip the main power switch on the PS off the fan moves a little on the cpu as well.

One thing, the little 1 pin connector for the power button came out and I'm not positive how it goes back thoguh ive tried many different ways. It was plugged in an 8 pin connector, and like I said, is only 2 pin.

Ideas??

TIA